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Accuracy and variability of the movement in Fitts' and Schmidt's laws

Published online by Cambridge University Press:  30 August 2019

Simon R. Goodman
Affiliation:
Department of Physiology, Rush-Presbyterian St.-Luke's Medical Center, Chicago, IL 60612-3864 [email protected]

Abstract

In Schmidt's experiments, only properties of actually produced movements systems are measured; in Fitts' experiments, external task parameters are measured too (target size and distance). Thus, the laws contain variables of different natures and cannot be reduced to each other even formally. These difference especially reveals itself in modeling: a model of variability can be simpler if it deals with the performance variables only. On the other hand, modeling Fitts' law, one should take into account not only the human effector system but features of the experimental apparatus as well. These differences have not been sufficiently reflected in Plamondon & Alimi's target article.

Type
Open Peer Commentary
Copyright
1997 Cambridge University Press

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